Use "Dimensionhole" so that you are sure your monster will not be destroyed or anything else until your next Standby Phase, and also, when your monster is back the attack restriction does not apply anymore.
You can use this card to Special Summon "Relinquished", then use its effect to absorb an opponent's monster. At the end of the turn, Relinquished is destroyed and the absorbed monster is destroyed as well. It's better to Tribute your Relinquished instead of letting it leave the field at the end of the turn.
If you have no other monsters on your side of the field, use this card to Summon "Dark Master - Zorc" and apply its effect. Since "Dark Master - Zorc" can't attack, and will be destroyed by the End Phase, you take no risk if you roll a six on your die roll. All other results will destroy at least one of your opponent's monsters.